The Truffle team is composed of professionals with many years of experience in the private equity & technology businesses


Miguel Sieler

CEO Circle , Life Sciences

Chairman of the portfolio companies Wittycell, a biotechnology company focused on the development of innovative vaccine adjuvants activating the immune system against infectious diseases and cancer and PlasmaPrime, a company specialised in advisory and training in blood transfusion worldwide.

Served in various senior positions with Bayer Group from 1975 to 2008 in Korea, Germany, Belgium, Brazil and France. Former CEO of Bayer Pharma France (1995 to 1998).

Former Chairman of Bayer Group France (1998 to 2008).

Board member of Nexity SA.

Law school graduate from the University of Tubingen, Germany and from Institut d’Etudes Politiques de Paris, France.